CVE-2026-85138
Received Received - Intake

SQL Injection in SeaCMS WeChat Module

Publication date: 2026-09-03

Last updated on: 2026-09-03

Assigner: VulDB

Description
A vulnerability was detected in SeaCMS up to 13.6. Affected is the function addslashes of the file weixin/index.php of the component WeChat Module. The manipulation of the argument Content results in sql injection. The attack may be launched remotely. The exploit is now public and may be used.

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Meta Information

Published
2026-09-03
Last Modified
2026-09-03
Generated
2026-09-03
AI Q&A
2026-09-03
EPSS Evaluated
N/A
NVD
CVE-2026-85138
EUVD
EUVD-2026-70534

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
seacms seacms 13.6
seacms seacms to 13.6 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-89 The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.
CWE-74 The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

CVE-2026-85138 is a SQL injection flaw in SeaCMS version 13.6 affecting the WeChat module. The issue occurs when the application fails to verify WeChat signatures for POST requests, allowing attackers to send crafted XML payloads to weixin/index.php. The raw XML is processed with addslashes() and then parsed by simplexml_load_string(), which decodes XML entities back to special characters like quotes. This decoded input is then used in SQL LIKE queries without proper sanitization, enabling SQL injection attacks.

Detection Guidance

To detect this vulnerability, monitor network traffic for POST requests to the weixin/index.php endpoint in SeaCMS 13.6. Look for XML payloads containing SQL-like conditions such as ' OR '1' LIKE '1. Check server logs for unusual SQL query patterns or errors.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary SQL commands on the database. They could steal, modify, or delete sensitive data, bypass authentication, or take control of the affected SeaCMS system. Since the attack is unauthenticated and can be launched remotely, any internet-facing SeaCMS 13.6 instance with the WeChat module enabled is at risk.

Compliance Impact

This vulnerability could lead to unauthorized access and exposure of personal data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations using vulnerable SeaCMS versions may face compliance violations, regulatory fines, and reputational damage due to potential data breaches resulting from SQL injection.

Mitigation Strategies

Immediately upgrade SeaCMS to a patched version. If unavailable, disable the WeChat module in SeaCMS. Verify WeChat signatures, timestamps, and nonce before processing POST messages. Use parameterized queries instead of string concatenation in the code.

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